<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
	</head>
	<style type="text/css">
		* {
				margin: 0;
				padding: 0;
				font-size: 16px;
				font-family: "微软雅黑";
			}
			.nav {
				width: 130px;
				height: auto;
				background: fuchsia;
				position: fixed;
				top: 50%;
				margin-top: -100px;
				left: 0;
				cursor: pointer;
			}
			.nav-l {
				text-align: center;
				line-height: 30px;
				font-size: 16px;
				border-bottom: 1px solid red;
			}
			.nav-l li {
				width: 130px;
				height: auto;
				list-style: none;
				background: #fe5e00;
				border-bottom: 1px green dashed;
				display: none;
				position: relative;
			}
			.nav-l:hover li {
				display: block;
			}
	</style>
	<body>
		<div class="nav">
			<div class="nav-1">
				首页内容
				<ui>
					<li>
						第二
						<div class="nav-q">
							<ui>
								<li>第三</li>
								<li>第三</li>
								<li>第三</li>
							</ui>
						</div>
					</li>
					<li>第二</li>
					<li>第二</li>
				</ui>
			</div>
		</div>
	</body>
</html>
